W5L2-产品生命周期

1.御韩颜面膜

W5L2-产品生命周期 W5L2-产品生命周期 W5L2-产品生命周期 W5L2-产品生命周期 W5L2-产品生命周期

2.Early in a product's life-cycle all the parts and labor associated with that product come from the area where it was invented.

production  theory

https://en.m.wikipedia.org/wiki/Product_life-cycle_theory